题目

The Winter Olympics is also called the White Olympics. At this time, many colorful stamps are published to mark the great Games. The first stamps marking the opening came out on January 25, 1932 in the United States for the 3rd White Olympics. From then on, publishing stamps during the White Olympics became a rule. During the 4th Winter Olympic Games a group of stamps were published in Germany in November 1936. The five rings of Olympics were drawn on the front of the sportswear. It was the first time that the rings appeared on the stamps of the White Olympics. In the 1950’s, the stamps of t 下列各项中的两个分子核外电子总数不同的是(　　) A．H2O2和CH3OH             B．HNO2和HClO C．H2O和CH4                D．HCl和HBr